Review on 💨 Efficient Dust Collection Fittings: POWERTEC 70125 4-Inch Pipe Hose Adapter - ABS Plastic Quick Coupler for Workshop, in Black by Derrick Shah

Advertised to fit 4" PVC pipe but will not fit. The fit on the smaller end is very tight and needs sanding to actually fit. The narrow end fits flexible hoses. I have no idea what the big circle is good for, certainly not suitable for 4" flex hoses. So it's not possible to connect 4" PVC to flexible hoses. You'd better go with the 4" fittings which I originally ordered and changed when I saw the PVC. Now I have to send them back and get the connectors Too bad I wouldn't give this product a star but the rating doesn't allow it.